镍基高温合金的热机械疲劳寿命预测模型研究OA北大核心CSTPCD
Research on Thermo-mechanical Fatigue Life Prediction Model of Ni-base Superalloy
针对发动机热端部件常用材料镍基高温合金GH4169进行了 200～450 ℃及400～650 ℃条件下的同相位热机械疲劳(TMF)试验,考虑TMF条件下多晶材料在弹性阶段产生的微观损伤应变能,提出一种适用于多晶材料的TMF寿命预测模型,并结合试验数据确定模型参数;采用GH4169、IN718、DD8三种高温合金对该模型的TMF寿命预测能力进行评估,结果表明,提出的寿命模型预测精度高于TMF寿命预测常用的Manson-Coffin模型和Ostergren模型.
In phase TMF tests on nickel-based high-temperature alloy GH4169,a commonly used material for engine hot end components,under conditions of 200-450 ℃ and 400-650 ℃ is conduc-ted.Considering the micro damage strain energy of polycrystalline materials in the elastic stages under the condition of TMF,a TMF life prediction model suitable for polycrystalline materials was pro-posed,model parameters were determined by combining the TMF test data.Three superalloys,GH4169,IN718,DD8,were used to evaluate the TMF life prediction ability of this model.The pre-diction accuracy of the life model is higher than that of the Manson-Coffin model and Ostergen model commonly used for TMF life prediction.
崔海涛;钱春华
南京航空航天大学能源与动力学院,南京,210016
镍基高温合金热机械疲劳(TMF)损伤应变能寿命预测
nickel-base superalloythermo-mechanical fatigue(TMF)dmamage strain energylife prediction
《中国机械工程》 2024 (001)
67-73,82 / 8
国家自然科学基金(91860111)
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